A/C Compressor clutch
I recently replaced the clutch bearing on my '92 taurus. From what I heard the A/C compressors are used in many vehicles, so the experience might be the same.
Just so you know, you may need a special tool to remove the clutch. Often the comp. and clutch are sold connected, and they are generally not seperated by the do-it-yourselfer.
The tool you can get for $40-$60. You'll also need a special tool to easily remove the c-clip that holds the clutch bearing on. The tool is called "snap clip pliers" and a pro pair cost me $30.
Before you tear it all up, know that I got a used compressor + clutch for $85 from a pulling yard locally. Good luck to you.